
.float-left {
    float: left;
}

.float-right {
    float: right;
}
.text-center {
    text-align: center;
}
.text-right {
    text-align: right;
}
.flex {
    display: flex;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
}

.flex-item {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
}
// flex 垂直布局
.column {
    flex-direction: column;
}
.flex-align-center {
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
}

.flex-pack-center {
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
}